<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			#div1{
				color: red;
			}
			#div2{
				letter-spacing: 5px;
			}
			#div3{
				/* line-height: 3; */
				text-align: center;
				/* vertical-align: middle;垂直居中 */
				line-height: 100px;
				
			}
			#div4{
				text-indent: 2em;
			}
			#div5{
				text-align:center;
			}
		</style>
	</head>
	<body>
		<div id="div1">这是hello world</div>
		<div id="div2">这是hello world</div>
		<div class="con" style="border: 1px solid black;width: 200px;height: 100px;">
			<div id="div3">这是hello world</div>
		</div>
		
		<div id="div4">这是hello world</div>
		<div id="div5">这是hello world</div>		
	</body>
</html>
